Photonics Research, 2015, 3 (6): 06000296, Published Online: Jan. 6, 2016
Impact of multipath effects on theoretical accuracy of TOA-based indoor VLC positioning system Download: 1169次
Optical communications Optical communications Free-space optical communication Free-space optical communication
Abstract
This paper discusses the time-of-arrival (TOA) based indoor visible light communication (VLC) positioning system in a non-line-of-sight environment. The propagation delay is assumed to be gamma distributed. The generalized Cramer–Rao lower bound for multipath propagation is derived as the theoretical accuracy limitation. The performance of the positioning system is affected by the shape parameter and the scale parameter of gamma distribution. The influences on positioning accuracy of multipath effects are analyzed through discussing the physical meaning of the gamma distribution parameters. It is concluded that the lower bound of positioning accuracy is attained when variance of the non-line-of-sight propagation-induced path lengths is zero. The simulation result proves that the theoretical positioning accuracy is in the order of centimeters with the given scenario.
Xuqing Sun, Jingyuan Duan, Yonggang Zou, Ancun Shi. Impact of multipath effects on theoretical accuracy of TOA-based indoor VLC positioning system[J]. Photonics Research, 2015, 3(6): 06000296.